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x86/vm86: Clean up vm86.h includes
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1#ifndef _ASM_X86_VM86_H
2#define _ASM_X86_VM86_H
1da177e4 3
6330a30a 4#include <asm/ptrace.h>
af170c50 5#include <uapi/asm/vm86.h>
9831bfb2 6
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7/*
8 * This is the (kernel) stack-layout when we have done a "SAVE_ALL" from vm86
9 * mode - the main change is that the old segment descriptors aren't
10 * useful any more and are forced to be zero by the kernel (and the
11 * hardware when a trap occurs), and the real segment descriptors are
12 * at the end of the structure. Look at ptrace.h to see the "normal"
13 * setup. For user space layout see 'struct vm86_regs' above.
14 */
15
16struct kernel_vm86_regs {
17/*
18 * normal regs, with special meaning for the segment descriptors..
19 */
49d26b6e 20 struct pt_regs pt;
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21/*
22 * these are specific to v86 mode:
23 */
24 unsigned short es, __esh;
25 unsigned short ds, __dsh;
26 unsigned short fs, __fsh;
27 unsigned short gs, __gsh;
28};
29
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30struct vm86 {
31 struct vm86plus_struct __user *vm86_info;
5ed92a8a 32 struct pt_regs regs32;
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33 unsigned long v86flags;
34 unsigned long v86mask;
35 unsigned long saved_sp0;
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36
37 unsigned long flags;
38 unsigned long screen_bitmap;
39 unsigned long cpu_type;
40 struct revectored_struct int_revectored;
41 struct revectored_struct int21_revectored;
42 struct vm86plus_info_struct vm86plus;
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43};
44
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45#ifdef CONFIG_VM86
46
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47void handle_vm86_fault(struct kernel_vm86_regs *, long);
48int handle_vm86_trap(struct kernel_vm86_regs *, long, int);
5ed92a8a 49void save_v86_state(struct kernel_vm86_regs *, int);
1da177e4 50
64ca9004 51struct task_struct;
64ca9004 52
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53#define free_vm86(t) do { \
54 struct thread_struct *__t = (t); \
55 if (__t->vm86 != NULL) { \
56 kfree(__t->vm86); \
57 __t->vm86 = NULL; \
58 } \
59} while (0)
60
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61/*
62 * Support for VM86 programs to request interrupts for
63 * real mode hardware drivers:
64 */
65#define FIRST_VM86_IRQ 3
66#define LAST_VM86_IRQ 15
67
68static inline int invalid_vm86_irq(int irq)
69{
70 return irq < FIRST_VM86_IRQ || irq > LAST_VM86_IRQ;
71}
72
73void release_vm86_irqs(struct task_struct *);
74
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75#else
76
77#define handle_vm86_fault(a, b)
78#define release_vm86_irqs(a)
79
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80static inline int handle_vm86_trap(struct kernel_vm86_regs *a, long b, int c)
81{
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82 return 0;
83}
84
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85static inline void save_v86_state(struct kernel_vm86_regs *a, int b) { }
86
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87#define free_vm86(t) do { } while(0)
88
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89#endif /* CONFIG_VM86 */
90
1965aae3 91#endif /* _ASM_X86_VM86_H */